public class Circular{
    Circle bottom;
    double height;
    void setBottom(Circle c){
	bottom = c;
    }
    void setHeight(double h){
	height = h;
    }
    double getVolme(){
	if(bottom == null)
	  return -1;
	else 
	  return bottom.getArea()*height/3.0;
    }
    double getBottomRadius(){
	return bottom.getRadius();
    }
    public void setBottomRadius(double r){
	bottom.setRadius(r);
    }
}